Abstract
The reaction of hydrazide with carbonyl chloride in the presence of sodium carbonates leads to the corresponding 1,2-diacylhydrazines [1a–t, R1C(O)NHNHC(O)R2, R1 = aryl, R2 = aryl or alkyl] in moderate to excellent yield (57–90 %). The latter reacts with 2,4-diphenyl-1,3-diselenadiphosphetane-2,4-diselenide (Woollins' reagent, WR) in refluxing toluene to give a series of new 2,5-disubstituted 1,3,4-selenadiazoles (2a–t, 51–99 % yield). All compounds were characterized spectroscopically and six compounds were characterized crystallographically.
Original language | English |
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Pages (from-to) | 1612-1618 |
Number of pages | 7 |
Journal | European Journal of Organic Chemistry |
Volume | 2009 |
Issue number | 10 |
DOIs | |
Publication status | Published - Apr 2009 |
Keywords
- Selenium
- Organoselenium chemistry
- 1,3,4-Selenadiazoles
- Woollins' reagent
- Ray crystal-structures
- P-SE anions
- Organoselenium compounds
- Selenium heterocycles
- Lawessons reagent
- Acidic media
- Mild-steel
- Derivatives
- 1,3,4-thiadiazoles
- 1,3,4-oxadiazoles